/*
 * Copyright 2007-2008 Brian Cavalier
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.bc.iterate;

import java.util.Iterator;

/**
 * A {@link Transform} that removes whitespace from the end of {@code String}s 
 * 
 * @author Brian Cavalier
 * @see Iterator
 * @see Iterable
 * @see org.bc.iterate.Iterate
 */
public class ChompTransform implements Transform<String> {
/*	public final static String EOL_CHARS = "\n\r\u0085\u2028\u2029";*/
	public final static String EOL_CHARS = "\n\r";

	public String apply(String s) {
		int last = s.length()-1;
		while(last >= 0 && (EOL_CHARS.indexOf(s.charAt(last)) >= 0))
			last--;

		return (last > 0) ? s.substring(0, last+1) : "";
	}
}
